Doob's Martingale Convergence Theorems - Discrete-time Results

Discrete-time Results

Similar results can be obtained for discrete-time supermartingales and submartingales, the obvious difference being that no continuity assumptions are required. For example, the result above becomes

Let M : N × Ω → R be a discrete-time martingale such that

for some p > 1. Then there exists a random variable MLp(Ω, P; R) such that MkM as k → +∞ both P-almost surely and in Lp(Ω, P; R)

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